<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区 -->
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
                </el-col>
            </el-row>
        <!-- 表格 -->
            <tree-table class="treeTable"
            :data="catelist"
            :columns="columns"
            :selection-type="false"
            :expand-type="false"
            show-index
            index-text="#"
            border
            :show-row-hover="false">
                <!-- 是否有效 -->
                <template slot="isOk" slot-scope="scope">
                    <i class="el-icon-success" v-if="scope.row.cat_deleted === false" style="color: lightgreen;"></i>
                    <i class="el-icon-error" v-else style="color: red;"></i>
                </template>
                <!-- 排序 -->
                <template slot="order" slot-scope="scope">
                   <el-tag size="mini" v-if="scope.row.cat_level===0">一级</el-tag>
                   <el-tag type="success" size="mini" v-else-if="scope.row.cat_level===1">二级</el-tag>
                   <el-tag type="warning" size="mini" v-else>三级</el-tag>
                </template>
                <template slot="opt" slot-scope="scope">
                    <el-button type="primary" icon="el-icon-edit" size="mini" @click="showUploadCate(scope.row)">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini" @click="delCate(scope.row)">删除</el-button>
                </template>
            </tree-table>
        <!-- 分页 -->
            <el-pagination
                 @size-change="handleSizeChange"
                 @current-change="handleCurrentChange"
                 :current-page="queryInfo.pagenum"
                 :page-sizes="[3, 5, 10, 20]"
                 :page-size="queryInfo.pagesize"
                 layout="total, sizes, prev, pager, next, jumper"
                 :total="total">
            </el-pagination>
        </el-card>
            <!-- 添加分类对话框 -->
            <el-dialog
              title="添加分类"
              :visible.sync="addCateDialogVisible"
              width="50%"
              @close="addCateDialogClose"
             >
             <!-- 添加分类表单 -->
              <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px" class="demo-ruleForm">
             <el-form-item label="分类名称:" prop="cat_name">
               <el-input v-model="addCateForm.cat_name"></el-input>
             </el-form-item>
             <el-form-item label="父级分类:">
                 <!-- 级联选择器 -->
               <el-cascader
                    v-model="CateLists"
                    :options="ParentCateList"
                    :props="casCaderProps"
                    size="small"
                    @change="parentCateChanged">
                    </el-cascader>
             </el-form-item>
              </el-form>
              <span slot="footer" class="dialog-footer">
                <el-button @click="addCateDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addCate">确 定</el-button>
              </span>
            </el-dialog>
            <!-- 编辑分类对话框 -->
            <el-dialog
                title="编辑分类"
                :visible.sync="uploadCateVisible"
                width="50%"
                >
                <!-- 内容主题区 -->
                <el-form :model="uploadCateForm" :rules="uploadCateRules" ref="uploadCateRef" label-width="80px" :status-icon="true">
                    <el-form-item label="分类名称" prop="cat_name">
                      <el-input v-model="uploadCateForm.cat_name"></el-input>
                    </el-form-item>
                </el-form>
                <!-- 底部按钮区域 -->
                <span slot="footer" class="dialog-footer">
                  <el-button @click="uploadCateDialogClose">取 消</el-button>
                  <el-button type="primary" @click="editRoles">确 定</el-button>
                </span>
            </el-dialog>
    </div>
</template>
<script>
export default {
    data() {
        return {
            // 查询条件
            queryInfo: {
                type: 3,
                pagenum: 1,
                pagesize: 5
            },
            // 商品分类数据列表 默认为空
            catelist: [],
            // 总数据条数
            total: 0,
            // 为table指定列的定义
            columns: [{
                label: '分类名称',
                prop: 'cat_name'
            }, {
                label: '是否有效',
                type: 'template',
                template: 'isOk'
            }, {
                label: '排序',
                type: 'template',
                template: 'order'
            },
             {
                label: '操作',
                type: 'template',
                template: 'opt'
            }],
            // 控制添加分类对话框的显示
            addCateDialogVisible: false,
            // 添加分类的表单数据对象
            addCateForm: {
                // 将要添加的分类的名称
                cat_name: '',
                // 父级分类的id
                cat_pid: 0,
                // 分类的等级默认要添加的是一级分类
                cat_level: 0
            },
            addCateFormRules: {
                cat_name: [
                    { required: true, message: '请输入分类的名称', trigger: 'blur' }
                ]
            },
            // 父级分类列表数据
            ParentCateList: [],
            casCaderProps: {
                expandTrigger: 'hover',
                label: 'cat_name',
                value: 'cat_id',
                children: 'children'
            },
            // 选择完成后保存的数据
            CateLists: [],
            // 控制编辑分类框的显示
            uploadCateVisible: false,
            // 编辑分类的表单数据
            uploadCateForm: {
                cat_name: '',
                cat_id: ''
            },
            uploadCateRules: {
                cat_name: [{ required: true, message: '请输入分类名称', trigger: 'blur' }]
            }
        }
    },
    created() {
        this.geiCateList()
    },
    methods: {
        // 获取商品分类数据
      async geiCateList() {
            const { data: res } = await this.$http.get(`categories`, {
              params: this.queryInfo
            })
            if (res.meta.status !== 200) {
                return this.$message.error('获取商品分类数据失败')
            }
            // 把数据列表赋值给catlist
            this.catelist = res.data.result
            this.total = res.data.total
        },
        // 监听pagesize改变的时
        handleSizeChange(newSize) {
            this.queryInfo.pagesize = newSize
            this.geiCateList()
        },
        // 监听pagenum的改变
        handleCurrentChange(newPage) {
            this.queryInfo.pagenum = newPage
            this.geiCateList()
        },
        showAddCateDialog() {
            this.geiParentCateList()
            this.addCateDialogVisible = true
        },
        async geiParentCateList() {
            const { data: res } = await this.$http.get(`categories`, {
              params: {
                  type: 2
              }
            })
            if (res.meta.status !== 200) {
              return this.$message.error('获取获取父级分类数据失败')
            }
            this.ParentCateList = res.data
        },
        parentCateChanged() {
            // 如果CateLists的length大于0就说咩选中了父级分类
            // 反之则为没有选中
            if (this.CateLists.length > 0) {
              this.addCateForm.cat_pid = this.CateLists[ this.CateLists.length - 1 ]
                // 为当前分类的等级赋值
              this.addCateForm.cat_level = this.CateLists.length
              return false
            } else {
                // 重置父级分类的id
                this.addCateForm.cat_pid = 0
                // 重置分类等级的id
                 this.addCateForm.cat_level = 0
            }
        },
        addCate() {
            this.$refs.addCateFormRef.validate(async valid => {
                if (!valid) return
                const { data: res } = await this.$http.post(`categories`, this.addCateForm)
                if (res.meta.status !== 201) {
                    return this.$message.error('添加分类失败')
                }
                this.$message.success('添加分类成功')
                this.addCateDialogVisible = false
                this.geiCateList()
            })
            },
        addCateDialogClose() {
            this.$refs.addCateFormRef.resetFields()
            this.CateLists = []
        },
        async showUploadCate(item) {
            const { data: res } = await this.$http.get(`categories/` + item.cat_id)
             if (res.meta.status !== 200) {
                    return this.$message.error('查询分类数据失败')
                }
            this.uploadCateForm.cat_name = res.data.cat_name
            this.uploadCateForm.cat_id = res.data.cat_id
            this.uploadCateVisible = true
        },
        editRoles() {
              this.$refs.uploadCateRef.validate(async valid => {
                if (!valid) return
                const { data: res } = await this.$http.put(`categories/` + this.uploadCateForm.cat_id, {
                    cat_name: this.uploadCateForm.cat_name
                })
                if (res.meta.status !== 200) {
                    return this.$message.error('更新分类失败')
                }
                this.$message.success('更新分类成功')
                this.uploadCateVisible = false
                this.geiCateList()
            })
        },
        async delCate(item) {
             const result = await this.$confirm('此操作将永久删除该分类, 是否继续?', '提示', {
               confirmButtonText: '确定',
               cancelButtonText: '取消',
               type: 'warning'
             })
              .catch(err => err)
              if (result !== 'confirm') {
                 return this.$message.info('已取消删除')
             }
            const { data: res } = await this.$http.delete(`categories/` + item.cat_id)
                if (res.meta.status !== 200) {
                    return this.$message.error('删除分类数据失败')
                }
                this.$message.success('删除分类成功')
                this.geiCateList()
            },
            uploadCateDialogClose() {
                this.$message.warning('已取消删除')
                this.uploadCateVisible = false
            }
    }
}
</script>
<style lang="less" scoped>
.treeTable {
    margin-top: 15px;
}

</style>